Loom dobby mechanism.



B. F. MOGUINESS- LUOM DOBBY MECHANISM.

APPLICATION FILED JULY 16. 1904.

PATENTED MAY 16, 1905.

UNITED STATES Patented May 16, 1905 PATENT OFFICE.

BENJAMIN F. MoGUINESS, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON& KNOWLES LOOM WORKS, A CORPORATION OF MASSA- OHUSETTS.

' .LOOM DOBBY MECHANISM."

SPECIFICATION forming part of Letters Patent No, 789,997, dated May 16,1905.

Application filed July 16, 1904. Serial No. 216,778.

To all whom it may concern:

Be it known that I, BENJAMIN F. MoGUINEss, a citizen of the UnitedStates, residing at Worcester, in the county of Worcester and State ofMassachusetts, have invented certain new and useful Improvements in LoomDobby Mechanism, of which the following is a specification. 1

My invention relates to a loom dobby mechanism, and more particularly tosupplemental parts. or attachments to be combined with and used on adobby.

The object of my invention is to improve upon the ordinary constructionof a dobby.

In the ordinary construction of a dobby guides are provided for thehooks which engage with and are operated by the reciprocatinglifter-bars. These guides serve to keep the hooks in their properposition; but no provision is made for guiding either the upper or lowerend or both the upper and lower ends of the levers to which the hooksare attached and which levers are centrally pivoted on the harness-jacksin the usual way. The hook-levers are consequently free to have alateral movement at their upper and lower ends and to rub against eachother, thus pro-- ducing friction and causing the parts to work harderand not give so good results. In my improvements I provide a guide orguide-slots, which I term a grate, preferably forboth the upper andlower ends of the hook-levers, and I form on each end of the hook-leversor attach thereto an extension which extends in the guide-slots of thegrate and acts to guide the hook-lever and prevent any lateral movementthereof at its ends and any contact with the adjoining lever.

I have shown in the drawing a detached portion of a dobby of the typeshown and described in myUnited States LettersPatent No. 7 52, 352, withmyimprovements applied thereto.

It will be understood that my improvements may be applied to any dobby.

Referring to the drawings, Figure 1 is a front view and partial sectionof a dobby-frame with some moving parts thereon, some of which arebroken away, showing my improvements applied thereto. Fig. 2 is adetached plan view of one end of the top guiding-grate for thehook-levers; and Fig. 3 is a detached sectional view through the frame,showing a plan view of one end of the bottom guiding- ,grate for thehook-levers.

levers 5, and to the upper and lower ends of each lever 5 is pivotallyattached the outer end of a hook 6 in the ordinary way. The

hooks 6 are raised by wires (not shown) to disengage their hooked endsfrom the lifterbars 7 which extend in slots 1 in the frame 1 and have areciprocating movement communicated thereto through links 8 by therocking lever 9 to move the hooks 6, the hooklevers 5, and the jacks 2,all in the'nsual and well-kno Wn manner. hooks 6 extend through guidesor grates 10, secured to the frame 1 and which in this instancecorrespond to the guides or grates shown and described in my said PatentNo. 752,352.

1 will now describe my improvements.

A guide frame or grate 11 extends transversely across the dobbyframe 1at the outer upper end thereof and in this instance has a side extensionor ear 11 at its inner edge on each end thereof, which is secured by abolt 12 to the top of the frame 1. (See Fig. 2.) The grate 11 has aseries of elongated openings 11 therethrough, which form guides for theupwardly-extending projections 5 on the upper ends of the hook-levers 5.The projections 5 are in this instance made integral with the levers 5and extend up through the openings 11 in the grate 11, which act toguide and hold in position the upper ends of the levers 5 and preventany lateral movement thereof. I preferably provide asecond guide frameor grate 12, having a series of elongated openings 12 therethrough forthe lower ends of the hook-levers 5. The grate 12 extends transverselythrough the dobbyframe 1 at the lower end of the hook-levers 5 (seeFig. 1) and is secured to the frame 1. The hook-levers 5 havedownwardly-extending projections 5 on their lower ends, in this instancemade integral, which extend through the elongated openings 12 in thegrate 12. The openings 12 guide the lower ends of the levers 5 andprevent any lateral movement thereof.

It will be seen that the upper grate 11 acts to guide and prevent anylateral movement of the upper ends of the hook-levers 5 or any contactof the hook-levers with each other without interfering in any way withthe free pivotal movement of said levers. The lower grate 12 has thesame action on the lower ends of the hook-levers 5.

It will be understood that the details of construction of myimprovements may be varied, if desired.

I prefer to use two grates 11 and 12 or their equivalent, one for theupper and the other for the lower ends of the hook-levers 5; but onlyone grate or its equivalent may be used for either the upper or thelower ends of said levers.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a dobby, the combination of the harness-jacks, the hook-leverspivotally mounted thereon, said hook-levers having projections extendingin substantial prolongation thereof, and a guide having elongatedopenings to receive the said projections.

2. In a dobby, the combination of theharness-jacks, the hook-leverspivotally mounted thereon, said hook-levers having projections extendingbeyond the upper ends thereof, and a substantially horizontal guidehaving elongated openings .into which said projections extend.

3. In a dobby, the combination of the harness-jacks, the hook-levers,and the hooks connected thereto, said hook-levers having projectionsextending beyond the connection of the hooks therewith, and a guide forengaging said projections. I

' B. F. MOGUINESS.

Witnesses:

J. C. DEWEY, M. HAAs.

